Why do women’s private parts turn black?

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　　labia

　　There are many interesting speculations about labia darkening, such as:

　　1. A woman’s labia turns black due to friction caused by walking.；

　　2. Because some lotions are not good, it seems that many lotions are corrosive.

　　These statements are funny, but not scientific. In fact, darkening of female labia usually does not rule out the following reasons:

　　1. Genetic reasons；

　　2. Caused by too frequent sexual life；

　　3. Normal pigmentation. That is to say, having sex will cause the labia to darken, including the vaginal opening and the inner and outer labia. During sex, the labia are repeatedly stimulated by external friction for a long time, causing local pigmentation to increase, and the color will deepen over time. This is a normal physiological phenomenon. At the same time, melanin from sexual stimulation hormones will also turn the labia into a dark halo.